Who's got calibers other than .308 in their AR10? I think they are 6.5Creedmoor, .243Winchester, .260Remington, .308 and .338Federal. How's the trajectory on those rounds vs. a .308? Is .338Federal the biggest/heaviest? Which round is the cheapest to shoot? How about recoil? Any pics? Thanks for the help =]

skyscraper

11-27-2011, 8:38 PM

Friend of mine has a nice 300 WSM in an ar-10. It has a custom made upper with fluted barrel and built in compensator. The gun is super accurate.

WDE91

11-27-2011, 9:29 PM

LOL you want to shoot an AR10 and are concerned about ammo prices
think .50-$2 per shot...

ElvenSoul

11-27-2011, 9:38 PM

The biggest I've seen is .325WSM. I used to own and shoot a 338Federal 18" DPMS Upper on CMMG Lower. The gun was very nice, no problems with mags or anything. I got offered a nice price. However I own a .458 Socom and get the same accuracy and range out of a smaller gun.

1Luv4SF

11-28-2011, 1:27 PM

I already have a JD upper and DPMS .308 barrel. If I wanted to do a different caliber then would I need a new upper receiver, or just a barrel and bolt?

1Luv4SF

11-29-2011, 1:34 PM

Any comment on that?

Pthfndr

11-29-2011, 5:22 PM

If you already have a .308 upper, you "could" use the same bolt with any cartridge that shares the parent case (.308), but there's a chance head space might not be correct.

You will need a new barrel.

Since you are getting a new barrel, it would be best to get a new bolt WITH the barrel to insure the head space is correct.

five.five-six

11-29-2011, 5:25 PM

Friend of mine has a nice 300 WSM in an ar-10. It has a custom made upper with fluted barrel and built in compensator. The gun is super accurate.

yea, that round seems to have some impressive balistics.... similar to the .300WM :eek: somewhere I read that it's a bit much for the gas system thouhg..YMMV

wash

11-29-2011, 7:11 PM

6.5*47 Lapua is supposed to be really nice in an AR10 and should shoot very similar to the Creedmore.

I've heard of some 7mm08 too, that sounds interesting because the 6.5mm cartridges don't gain much velocity, they just are accurate because they are pretty fast and they shoot high B.C. bullets. 7mm might split the difference nicely.

1Luv4SF

11-29-2011, 7:50 PM

I just saw a rifle chambered in 6.5Lapua featured on the Military channel. Top 10 sniper rifles I think it was. Think they said it's ballistics exceed 7.62x51 with less recoil of course. But any cartridge with the name Lapua on it is gonna be pricey =/

Bhobbs

11-29-2011, 8:27 PM

I just saw a rifle chambered in 6.5Lapua featured on the Military channel. Top 10 sniper rifles I think it was. Think they said it's ballistics exceed 7.62x51 with less recoil of course. But any cartridge with the name Lapua on it is gonna be pricey =/

That's because 6.5x47 Lapua is match grade ammo from the start. It was designed as a mid range match round. .260 Rem is hunting grade and you have to hand load it to get the best performance. 6.5 Creedmoor is a cheaper match ready round that is similar to the 6.5 Lapua and .260 Rem.

Hoop

11-29-2011, 8:39 PM

I would probably go 260rem as I hear it is the easiest to form from other calibers (ie, neck-up 243 or neck down 7mm08).